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Long-Distance HD Video Transmission Radio - China Suppliers & Factory for Unidirectional and Bidirectional Data Transmission
The COFDM series long-distance HD video transmission radio is highly suitable for reconnaissance, public security / fire protection / traffic / emergency rescue, customs border defense / maritime surveillance inspection, real-time broadcast / on-site monitoring, power line inspection / pipeline inspection, plant protection, and other drones and unmanned aerial vehicles, industrial and commercial unmanned aerial vehicles, and high-end consumer drones. It is designed for high-quality real-time mobile video transmission in complex environments such as urban areas, seas, and mountains.
Characteristic
Long-distance transmission: 1w/5w radio, with a visible distance of 20 kilometers / 50 kilometers.
Super anti-multipath ability, used in complex operating environments, supports high-speed movement (More than 600 kilometers per hour).
Broadcasting / surveillance level HD video encoding: HDMI/HD-SDI/CVBS adaptive, 4K/1080P/1080i/720P/576P adaptive.
Bandwidth 2/4/8MHz adjustable: multi-bandwidth, multi-bit rate, multi-mode.
Multiple encryptions to avoid illegal reception.
Small modular design: small size, light weight, easy to integrate and use.
Low power consumption, low heat.
Built-in bidirectional data transmission module: 410-480/840-845/902-928MHz, 3.6-19.2kbps conventional/19.2-230.4kbps frequency hopping, 1-2w, TTL/232/485/422, 3.3-30VDC.
Product Lineup
HDMI
COFDM series-1WT transmitter
Range: 1W: more than 20 kilometers
Size: 10.8x8.2x2.8cm, 233g
HDMI
COFDM series-5WT transmitter
Range: 5W: more than 50 kilometers
Size: 10.8x9.0x2.8cm, 289g
HDMI
COFDM series-10WT transmitter
Range: 10W: more than 50 kilometers
Size: 19.6x14.6x3.4cm, 990g
COFDM series-0WR receiver
Size: 13.6x11.7x3.4cm, 425g
CVBS
COFDM Ground low delay CVBS transmitter
Range: 3W: above 3 km
Size: 6.7x4.8x2.3cm, 80g
Technical Specifications
| Operating Frequency | 300-350MHz or 560-610MHz (200MHz-2.7GHz can be customized) |
| Transmitting Power | 1W/5/10W |
| Receiving Sensitivity | -106dBm@2MHz |
| Modulation Coding | QPSK/16QAM/64QAM |
| Rf Bandwidth | 2-8MHz adjustable |
| Transmission Stream | 2-20Mbps adaptive |
| Forward Error Correction | 1/2、2/3、3/4、7/8 |
| Protection Interval | 1/4、1/8、1/16、1/32 |
| Carrier Number | 2K |
| Power Flatness | Less than 0.2db in 10MHz band |
| Shoulder Ratio | When the output power is 27 dB, the band to shoulder ratio is better than -30 dB |
| Second Harmonic | ≤ -65dB |
| Mer | 32dB |
| Transmission Distance |
1W: above 20km 5W: above 50km 10W: above 100km (sight distance) |
| Video Input |
HDMI/SDI/CVBS: 720x480 60I(NTSC)、720x576 50I(PAL)、720 50P、720 60P、1080 50I、 1080 60I、1080 24P、1080 50P、1080 60P (CVBS video input N/P adaptive) |
| Video Output | HDMI / RJ45 IP simultaneous output |
| Video Stream | 2-20Mbps(H.264/H.265) |
| Video Input Interface | HDMI/CVBS (Low latency) |
| Video Output Interface | HDMI |
| Video Coding Format | H264+(HDMI)/H.265(CVBS) |
| System Delay | Less than 180ms (CVBS end-to-end low latency less than 120ms) |
| Video Delay | Less than 250ms |
| Encryption Method | 128 bit AES encryption |
| Protection Standard | All aluminum radiator shell, anti-rust, shockproof design |
| Operating Temp/Voltage | -30℃~+70℃、11-16V |
| Operating Current | 1W/Receive/5 W/10W/CVBS 3W Receive: 1.3A/0.35A/2.8A/5.9A/1.7A@12V |
| Overall Dimension |
1W/Receive/5W/10W/CVBS 3W Repeat: 10.8x8.2x2.8 / 13.6x11.7x3.4 / 10.8x9.0x2.8 / 19.6x14.6x3.4 / 6.7x4.8x2.3cm |
| Weight |
1W/Receive/5W/10W/CVBS 3W Repeat: 233g / 425g / 289g / 990g / 80g |
| Control Interface | Standard RS232 interface, 8-bit data bit, 1-bit stop bit, even-check, baud rate: 19200 |
| Transparent Data Interface | A unidirectional transparent serial port transmission, 8 data bits, 1 stop bit, support odd check, even check, wireless check, baud rate: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400 |
| Built-In Bidirectional Data Transmission Module | 410-480/840-845/902-928MHz, 3.6-19.2kbps conventional/19.2-230.4kbps frequency hopping, 1-2W, TTL/232/485/422, 3.3-30VDC |
| Power Consumption | ≤ 15W (1W radio), ≤ 35W (5W radio) |
Frequently Asked Questions
What is the maximum transmission distance of the COFDM series radios?
The transmission distance depends on the transmitter power. The 1W transmitter covers above 20km, the 5W transmitter covers above 50km, and the 10W transmitter can reach above 100km under line-of-sight conditions.
What video formats and resolutions are supported by the system?
The system supports adaptive HD video encoding including HDMI, HD-SDI, and CVBS signals. It adaptively handles resolutions from 576P up to 4K, including 720P, 1080i, and 1080P at multiple frame rates.
Does the system support video transmission during high-speed movement?
Yes. The system features super anti-multipath capability and is designed to operate in complex environments while supporting high-speed movement exceeding 600 kilometers per hour.
What type of encryption is used for secure data transmission?
To prevent illegal reception and ensure secure transmission, the system uses standard 128-bit AES encryption alongside multiple optional encryption configurations.
What is the latency of the video transmission?
The system delay is less than 180ms, with CVBS end-to-end low latency achieving less than 120ms. The total video delay is kept under 250ms.
What are the environmental protection standards and operating temperature ranges?
The devices feature an all-aluminum radiator shell designed with anti-rust and shockproof features. They operate reliably in temperatures ranging from -30℃ to +70℃.